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8757993 Gear pump with fluid communication portion  
In a gear pump according to the present invention, a wall surface portion of a casing (2) includes a drive side partition surface (41) on which tooth crests (11) of a drive gear (10) slide, a...
8753100 Multiple rotor fluid transfer engine  
A fluid transfer engine employs a case with a cylindrical inner wall having an operating radius extending from a case axis. A main rotor is carried within the case and incorporates a lobe with a...
8753098 Refrigerant compressor  
A refrigerant compressor includes: an electric motor including a stator and rotor inside a sealed vessel; a compressing mechanism driven by a crank shaft in the rotor; a lower portion oil pool...
8753099 Sealing system for gerotor apparatus  
According to one embodiment of the invention, a gerotor apparatus includes a first gerotor, a second gerotor, and a synchronizing system operable to synchronize a rotation of the first gerotor...
8747091 Water injection type screw compressor  
A water injection type screw compressor wherein gas sucked from an intake flow is supplied to a rotor chamber, compressed and discharged into a discharge channel as compressed fluid together with...
8749079 Integrated wankel expander-alternator  
A compact Wankel expander-alternator combination is provided. The combination includes a stationary outer housing that has embedded stator coils and a rotating inner housing having corresponding...
8747088 Open drive scroll compressor with lubrication system  
A compressor may include a compressor housing, an oil sump, an intake chamber, a compression mechanism, a drive shaft, and a first oil passage. The oil sump may be in communication with the...
8747090 Rotary compressor with improved oil retention  
A rotary compressor includes: a driving element which is provided inside a sealed container; and a rotary compression element which is provided inside the sealed container so as to be located...
8747087 Scroll pump having pockets formed in an axial end face of a scroll wall  
In some examples, a scroll pump 10 may include two scrolls, which are co-operable for pumping fluid from an inlet to an outlet on relative orbiting motion of the scrolls. Each scroll may include a...
8747086 Scroll compressor  
A scroll compressor is constructed by combining a stationary scroll and an orbiting scroll formed by erecting a scroll-shape wrap upright on a base plate meshing with each other. A scroll member...
8747085 Sliding vane pump with improved rotor profile  
A vane cell pump has a rotor mounted in a pump housing and driven by a shaft, multiple vane plates mounted in the outer circumference of this rotor, and an outer ring that surrounds the rotor and...
8747089 Fluid machine and seal member used for the same  
An O-ring has a shape including a first portion that is arranged side by side with a suction port in an axial direction, a second portion that is arranged side by side with a suction port, and a...
8740595 Gear pump  
A gear pump includes: a first pump constructed from a first drive gear rotated by driving of a drive shaft and a first driven gear rotatably arranged coaxially with a rotary shaft; and a second...
8740594 Scroll compressor including seal member and guide ring  
A scroll compressor includes a fixed scroll, an orbiting scroll, a crankshaft rotationally supported on a frame to drive the orbiting scroll, a seal member between an orbiting scroll back surface...
8739933 Oil pump for a refrigeration compressor  
An oil pump is applied to a compressor which comprises a shell (1) inferiorly defining an oil reservoir (3) and carrying: a cylinder block (2) in which is journalled a crankshaft (4) carrying a...
8742633 Rotary drive with linear actuators having two degrees of linear movements  
A rotary and linear motion device includes a magnetic stator assembly, opposed electromagnetic actuators, and a linear-to-rotary converter (e.g., cam). Each electromagnetic actuator includes a...
8740593 Variable displacement pump having a rotating cam ring  
Vane pump mechanical losses are reduced by removing vane friction losses and replacing them with lower magnitude journal bearing fluid film viscous drag losses. A freely rotating cam ring is...
8740592 Adjustable vane cell pump with a slide comprising recesses  
An adjustable vane cell pump is provided having a rotor, which includes, but is not limited to bearing slots extending in radial direction, in which cane plates displaceable relative to the...
8734125 Crankcase heater systems and methods for variable speed compressors  
A system includes a compressor having a shell housing a compression mechanism driven by an electric motor in an on state and not driven by the electric motor in an off state. The system also...
8733316 Rotating internal combustion engine  
The invention is an internal combustion engine converting the fuel/air mixture (17) to energy, comprising at least one engine having at least one engine cover (2), at least one external piston (5)...
8734141 Stator/rotor assemblies having enhanced performance  
A stator/rotor assembly includes at least one extruded preform bonded to a stator housing and/or a rotor mandrel. A method of constructing a stator/rotor assembly includes extruding at least one...
8734140 Reversible gerotor pump  
A reversible gerotor pump for a machine having a drive shaft is provided, the pump including a housing, an offset ring, and an inner and outer gear. The offset ring is disposed in the housing and...
8734142 Rotation preventing member of a scroll compressor  
Disclosed is a scroll compressor. As two side surfaces of a rotation preventing member are formed to be flat with keys, the rotation preventing member, a main frame, and an orbiting scroll may be...
8733317 Rotary, internal combustion engine  
A rotary engine has a rotor that has rockers pivoting in chambers. As each rocker pivots, it rotates an outer crankshaft. Each outer crankshaft has a spur gear that engages a stationary ring gear....
8734126 Screw compressor  
A screw compressor includes a low pressure stage compressor body; a high pressure stage compressor body that further compresses a compressed air compressed by the low pressure stage compressor...
8726660 Dual-inlet supercharger for EGR flow control  
A supercharger compressor includes a plurality of rotors rotatably mounted in a housing, a first inlet for air, a second inlet for recirculated exhaust gas, and a flow separator. The flow...
8721310 Rotary motor for compressible media  
A rotary motor for compressible media, containing at least one impellor and at least one stator mounted between two mutually coupled and concurrently mounted bearing plates, adjusted for a...
8721309 Airtight compressor  
An airtight compressor includes a compression mechanism disposed inside an airtight container in a position below a gas retention space. An oil supply passage supplies oil from an oil reservoir...
8721308 Water injected scroll air compressor  
As pressure in a water tank rapidly rises when water inside a compressor is evaporated by the high temperature of compressed air and this situation makes the operation unstable, an object of the...
8714950 Scroll compressor having tip seals of different lengths having different thickness or widths  
A scroll compressor is provided that can reliably prevent a situation in which a product whose performance is degraded due to misassembly of a tip seal is shipped. In the scroll compressor, tip...
8714135 IDAR-ACE inverse displacement asymmetric rotating alternative core engine  
The disclosure provides engines or pumps that includes a rotatable shaft defining a central axis A, the shaft having a first end and a second end. The shaft can have an elongate first island...
8714951 Fluid energy transfer device  
A rotary chambered fluid energy-transfer device includes a housing with a central portion having a bore formed therein and an end plate forming an arcuate inlet passage, with a radial height and a...
8715400 Double vacuum pump apparatus, gas purification system provided with double vacuum pump apparatus, and exhaust gas vibration suppressing device in double vacuum pump apparatus  
A double vacuum pump apparatus (Y2) includes positive displacement vacuum pumps (40A, 40B) and lines (52, 60). Each of the vacuum pumps includes a suction port (41) and a discharge port (42), and...
8708678 Gear pump  
A nonmetallic pump with a gear pump assembly having an adapter spool mounted to an electric motor. The pump assembly is designed to reduce manufacturing costs and to provide access for many...
8707929 Multi-rotor rotary engine architecture  
A multi-rotor internal combustion engine has a plurality of rotary internal combustion units axially distributed along an engine axis. Each unit has a rotor mounted on an eccentric portion of the...
8708677 Screw compressor having injection having injection mechanism that injects oil or refrigerant toward a starting end of an extending direction of a helical groove of the female rotor or the male rotor  
A screw compressor includes a screw rotor, a gate rotor and an injection mechanism. The screw rotor is provided with multiple helical grooves. The gate rotor is provided with multiple gates...
8708676 Drive system having a variable output gerotor pump  
A variable output assembly including a hydraulic pump disposed on a pump running surface located on a center section, end cap or other hydraulic mounting member. The pump may be a gerotor or other...
8708679 Vane pump for pumping hydraulic fluid  
A vane pump of the intravane type for pumping hydraulic fluid, wherein each vane of the pump has two intravanes and that pressurized oil is provided to one or both intravane regions when the vane...
8702407 Multistage roots vacuum pump having different tip radius and meshing clearance from inlet stage to exhaust stage  
A multistage vacuum pump includes a stator housing a multistage rotor assembly, each stage having intermeshing Roots rotor components, wherein the tip radius of the rotor components at an inlet...
8702409 Screw compressor having male and female rotors with profiles generated by enveloping a rack profile  
Screw compressor (1) comprising: a male (2) and a female rotor (3) rotating respectively around a first axis (01) and second axis (02) of rotation, said rotors (2;3) showing, in cross section,...
8702408 Slide for use in a screw compressor  
A slide for use in a single screw compressor is disclosed. The screw compressor is arranged to vent the flutes of its main rotor at all times, without having to provide a check valve in the...
8702406 Compressor alignment method and device  
A compressor assembly method may include locating a first scroll member on a bearing housing of a compressor having a second scroll member located axially between the first scroll member and the...
8696335 Oil free screw compressor  
A multi-stage oil-free screw compressor includes: a suction throttle valve for controlling air intake into the compressor; a piston assembly for operating the suction throttle valve; and a...
RE44841 Pump with conveying chamber formed in outer rotor surface  
A pump is formed by a housing (10) having an inlet (11) for connection to a source of fluid and an outlet (12) for pumped fluid. A rotor (15) is rotatable within the housing and the inlet (11) and...
8690555 Two-stage rotary expander, expander-compressor unit, and refrigeration cycle apparatus  
An expander-compressor unit (10) includes a two-stage rotary expansion mechanism (3) having a first cylinder (41) and a second cylinder (42). In the expansion mechanism (3), a suction port (71)...
8690557 Variable displacement vane pump  
A variable displacement vane pump includes: a plate side high pressure introduction groove formed in the pressure plate or in the cam ring, formed so that an entire is positioned within a radial...
8690558 Compressor and manufacturing method thereof  
The compressor includes a first constituent element and a first slider. The first constituent element is capable of being laser welded. The first slider is composed of cast iron capable of being...
8689763 Rotary engine with a circular rotor  
The rotary engine includes a circular stator, a circular rotor rotating about the stator; the rotor and the stator being separated by a circular cylinder and at least one element with two flanges....
8689766 Spherical two stroke engine system  
A positive displacement internal combustion engine with the strongest mechanism for converting thermal energy of combustion gases to rotational motion, being composed of a body with spherical...
8690544 Oil pump  
An oil pump includes a capacity adjustment mechanism that changes the pump capacity by moving a tubular body in a tube radial direction, with a pump chamber formed between the tubular body and an...